Phonograph-horn.



A. G. SOISTMANN. PHONOGRAPH BURN. n APLIcATIoN Plum FEB. 1, 1910.1,100,8495 Patented June 23,1914

2 SHEETS-SHEET 1.

uma.; www. mf. uw, mammals c A. G. SQISTMANN. PHONOGRAPH HORN.APPLIoATIoN FILED 11.3.1, 1910.

Patented June 23, 1914.

2 SHEETS-SHEET 2.

.uni'rnn s'rairns rarnn'r onirica.

' AJJoLrH sorsfriaann, or emanan, New JERSEY.

@Reiseseiten-nenn.

To allwhom time? concerne.

'Be it known that I, AnoLrir G. Soisr MANN, ,a citizen of the UnitedStates, residing' at Camden, in the 'county of Camden. and State of NewJersey, have invented a new and` useful -Plionograph-Horn, of

which the following is a speciiication.

My invention relates to improvements in phonograph hornsl and method ofmaking saine. v

The object oi my invention is 'to provide a horn of Wood or othei`fibrous material having a flaring or bell-shaped'inouth. The object isto produce a horn which shall be ex! tremely light in Weight and whichshall be sov constructed as to maintain its shape and so that itscomponent parts shall be held firmly together Without. being affecteduiidesirably either by changes in temperature orother atmosphericconditions and also to produce a horn which shall have satisfactoryacoustic properties. It seems to be Well rec- Ognized in the art thatthe wooden horn is the most satisactory'horn for phonograph purposesboth from acoustic considerations 4'and also for considerations ofappearance Where different kinds of Wood may be used to match otherparts of the inaehine. It has 'also been found that the liaring orbell-- mouthed :formation is the shape of the horn which is`nowuniversally den'ianded, and consequently which must be supplied bysuccessful manufacturers and d ialers.

The flaring horn, made ot tapered strips, requires that each. taperedstrip be bent in one ldirection to secure the circular crosssection ofthe horn, While a large part of its The wooden horn which, has had themost extended success up to the present time, is made oi' a plurality ofhorn shaped layers,

each ylayer composed of 1separate composite strips of cross-grainedveneer, andthe flare is made by separating the strips at the tiarriin i9omitted.

Specification of Letters Patent. i Qtnted Ju ne 23, 1914, 4 Applicationiiled February T., 1910. Serial No. Eel-23. i

ing end of the horn and inserting filling pieces. I have found howeverthat a much less expensive horn can be made in whichp t-he componentparts will aii'ord suiiicieiit reinforcement to each other. to overcomethe internal stress, above referred to, to maintain the structure ingood condition, and Without employing separate composite strips ofcross-grained veneer, .and Without einploying filling pieces between theseparated strips at the iiaring end of the horn.

The accompanying drawings illustrate an example of a successfulembodiment of my invention.

Referring to these drawings z-Ifigure l is a side elevation of my horn.Fig. 2 is a cross-section on line 2 2 of Fig. l .vith the Fig. 3 is alongitudinal sec. tion on line 3-3 of Fig. l. Fig. 4 is an elevation ofthe two eoperating horn 'shaped shells, one adapted to superiinpose theother, the view showing one1 shell part'ly inserted within the other.Fig. 5 is an elevationof a. taneredtfrf Similar numerals refer tosimilar parts throughout the .several views.

In constructing' my horn, I provide a number of suitably shapedtaperedstrips (l, toi' example of a single layer of veneer or very thinwood. A number of these I assemble on a'properly shaped form, being theshape desired for the interior ot' the horn. The strips obviously are soshaped that the longitudinal edges of each strip will make close contactWith each neighboring strip throughout the extension of theirlongitudinal edges. These strips are secured to the `form by brads orother suitable means, and are then bound together wrapping around thesaine. the reinforcing or retaining bands, such. as Y. S, i) and 10, oftape or any suitable t'abric, glued thereto. rlhe strips of wood beingso thinthat each strip can readily be made to take lthe shape of theform upon which it is placed, namely the double transverse bend, tosecure the circular crosssection as well as the flaring or bell-'shaped'formation ot' the horn.` In this Way is termed the inner shell 11.Uponanother form', of slightly greater dimensions, namely of a dimensionwhich lWill form a shell i2. having its interior dimensionsapproximately corresponding tothe outer dimensions of shell 11, lassemble the suitably l shaped tapered strips 13 also, for example, of asingle layer of veneer or very thin wood. These strips 13 are securedtol 'the form in a similar manner by brads or other suitable means andare then bound together by the encircling retaining or reinforcingjtapes or bands such as 14, 15, 16, 17 and 18,

and securely glued thereto. When the two shells 11 and 12 are thusformed the entire outer surface of shell 11 and the entire inner surfaceof shell 12 are coated in with glue or other suitable adhesive material,and

s the two shells brought together, 12 fitting the wood will runsubstantially parallelA with one of its longitudinal edges and will thusbe at an angle with the other longitudinal edge toward its wider end, asindicated in Fig. 5, and also by the arrows in Fig. 4.

' I so arrange thev several tapered strips of each layer, that thestraight rain'portion of the tapered strips of one ayer will lie againstand coperate with vthat portion 0f the tapered strips of the other layerhaving Y the grain running at an angle with its adjacent longitudinaledge. Thus what would otherwise be the weaker portion of each taperedstrip, is reinforced by a straight grain portion of another strip, andit follows that throughout that part of the extension of each stripwhich is Isubjected to thedoublc transverse bending, the grain ofthestrips of one layer cross the grain of the strips of the other layerthus adding substantially to the stability of the entire strucF ture.The structure thus formed is' then placed upon a suitable clamping anddrying form which willpress all the parts of the structure into thedesired shape of the flaring or bell-mouthed horn. Heat is applied andthe pressure 'is sufficient',v to cause the glue to seek all apertur andcracks between the several parts. After which a continuation of dry heatcauses the drying and set ting of the glue, whereupon the structurebecomes one of great strength, very light in weight and having resonantqualities-of a high order. A ring or rim 19 may be glued to the outerrim or .margin of the horn to add still further to its strengthand alsoto y its appearance.

This horn being symmetrical in cross-section, lmay be placed upon 'a'lathe and the temporary retaining or reinforcing bands 14, 15,16, 17'and18 on the outer shell may be removed, and the whole ,outer surface' andinner surface of the horn are given a high polish.' It will beunderstood thatthe bands, such as 7, 8, 9 and 10, on the inner shell 11,being covered by the superimposing shell 12, remain as additionalreinforcing means between said shells,'and undoubtedly exert'considerable reinforcing power, and

4being pressed firmly between the shells, by

the pressure exerted thereon in the gluing operation, theseveralelements partake ,largely of the nature of an integral structureso far as tone qualities are concerned.

` A metallic thimble or. tapered sleeve,com posed of the outer member 20and the inner member 21, suitably spun together, adds further to .theStrength of the -horn at its smaller end, and affords meansfor securingthe same to the phonograph.

It will be'understood that-my invention is not to be confined to thespecific embodiment above described as a preferred form or as anexample. My claims are intended to include all reasonable equivalents,and are not to beconstrued to have limitations not absolutely necessaryor specifically( recited.

It will be understood lthat other fibrous material may be used in lieuof wood without departingfrom the spirit of my invention, and also thatthe tapes or reinforcing bands may run either in a circular directionaround the horn vor may consist of separated strips runninglongitudinally or 1n any other desired direction, at different points onthe horn. 'lhe essence of thisfeature being that strips of tape orsimilar material are secured at different points over adjacent edges ofthe strips that is, over the points between adjacent strips, tocontributel in holding said adjacent edges together, and also that theseseveral strips being glued on both sides when placed intermediate thetwo shells will be firmly'glued to both shells and serve ,to reinforcethe several strips of all the slellsfthereby reinforcingthe en-I tirestructure. l l

What I claim is 1.4 A symmetrical larin or bell shaped horn of circularcross-section, composed of a plurality of shells one secured within another', each shell composed of tapered strips of veneer bent'both inlongitudinal and. transverse directions and arranged to breakjoints withthe strips of the adjacentshell, eachv strip having a gradual taperthrough the .greater part of its lextension with curved flaring.margins-at its larger end and cach strip of a layer contactin throughoutthe extent of both its longitu inal edges with adjacent strips.

2. A symmetrical flaring 0r bell shapedl iarg'er ends, the sa-iri stripsbeing in longitudinal and transverse and arran ed t0 break joints withthe strips of the adjacent shell, each strip gradual taper through thelts extension with curved `bent both contacting throughoutv the extentof both directions its longitudinal edges with adjacent strips.

l ADOLPH G. SOISTMANN.

Witnesses: HOWARD S. OKmn, MAE HORMANN.

having a

